I don't want to solve the case when I'm a little policeman.

Chapter 346 Xu Zheng's New Invention
In the early morning of the next day, the sky was full of sunrise, and there was a lot of water vapor in the air outside. It seemed that it was going to rain heavily.

As for Xu Zheng, he received a call from Zhang Yuqi at five o'clock in the morning, asking him to get up early and go to Fuzhong Smart City.

It turned out that none of the city bureau's current survey and trace inspection experts found any evidence at the scene yesterday. No, Yan Zizhong proposed to let Xu Zheng try it. After all, Xu Zheng's technical investigation skills are still obvious to all.

But last night, neither the spot survey nor the trace inspection found any results. Wan Haihong and the others discussed it. If it didn't work, they would focus on the interrogation. Maybe Miao Yu's words were not rigorous and he would make mistakes.

This is also a helpless way, after all, the existing evidence is not good for Zhou Mu, and Zhou Mu and Miao Yu both deny each other that they killed someone.

After Xu Zheng answered the phone, he didn't set off directly, but got into his small studio. He wanted to prepare a potion. With the advanced technical detection technology and knowledge he was given by the system now, it happened that he still had skull angiography at home. The ingredients of the agent, plus other materials he bought online before.

Enough to make a bloodstain stripper.

There is no air-conditioning in his small studio, and when he came out, he was already drenched. The weather in Changming City is like this. It is very hot in summer, and when it rains, people feel like they are living in water vapor. , feels wet to the touch.

At six o'clock, Xu Zheng rushed to the scene of the crime in Fuzhong Smart City. At this time, the squadron leader Xu of the Technical Investigation Brigade was waiting here, "I'm sorry, Squadron Xu, I'm late."

Old Xu is a simple and honest technician. He wiped the sweat from his forehead when he heard the words, "Young people like to sleep in late. This work is not too rushed, as long as the results are released before the interrogation."

Xu Zheng put on his mask, gloves, shoe covers, and headgear and picked up the tools used for technical investigation, "Then let's start. In this weather, if you move around, you'll be sweating all over. It's better to stay in the air-conditioned room for comfort."

While the two were talking, the work officially started. Room 7012 is now equipped with several high-power lamps, and the inside is as bright as day, and it is extremely bright. Working in this environment, it must not be too hot to die.

Before Xu Zheng started, he felt that his gloves were soaked, "Squadron Xu, can you tell me about your previous work?"

Old Xu nodded, and didn't hate that Xu Zheng didn't do his homework when he came, "Look, the three figures on the ground are not far apart, and with the blood oozing from the wounds of their corpses, it can be judged that they were children at that time. The three people in Yanjiang were kneeling here. Tong Yanjiang was slightly obese, and he was in a senior grade, and he hadn't eaten for several days. Therefore, when he just stood up, he was hit on the back of the head with a stick.

Guo Jingqing stood up, but when he ran away, he was caught by Tong Yanjiang's body, and he was knocked on the temple.

As for Chu Yi, because he is young, and because he treats Zhou Mu and Miao Yu's wives not only as lovers, but also because of various behaviors that destroy their personality, Miao Yu and Zhou Mu take the most care of him. There are also many.

You see, there are three places of blood falling automatically. This is because Chu Yi was hit on the head three times. Someone turned his body, it should be to make sure that there is no death, and make up.

We can't tell who the murderer is from the footprints near the corpse. The main reason is that the corpse has traces of dragging, which ruined the footprints of Zhou Mu and Miao Yu a lot.

So from the footprints, we can only roughly judge where the murderer stood. "

Xu Zheng frowned. It seems that the murderer still has a little knowledge of criminal investigation and judgment, and knows how to destroy the scene of the crime. It is really difficult to deal with this situation. He glanced at the surrounding walls, spraying blue shadows everywhere. Agent, this is to take fingerprints, "Squadron Xu, are there only Zhou Mu's fingerprints at the crime scene?"

This time, Squadron Xu was watching Xu Zheng's homework, so he wore a mask, shoe covers, and headgear. It was just the weather in the early days of the heavy rain, which made him sweat just because he was slightly fat. Therefore, he wanted to remind Xu Zheng to walk slowly. program, but I don’t know how to say it, “Yes, none of the fingerprints extracted by these blue contrast agents belong to Miao Yu, including the walls of the stairs.

If it weren't for the sporadic half-missing footprints, it really wouldn't prove that Miao Yu was at the scene of the crime. "

Seeing Xu Zheng turn around and walk towards the wall, Team Xu wiped the sweat off his neck again. He didn't believe that Xu Zheng could find anything, because all the experienced technical investigation colleagues from the Municipal Bureau came over and found no real evidence.

So, he hurriedly asked: "Why, Xiao Xu, you discovered something new?"

Xu Zheng could hear the slight impatience of Xu Squadron, but this was work, and even though it was stuffy, hot and smelly here, he still had to insist on finishing the inspection.

In fact, the bloodstains on the walls were similar to the ones on the ground, because there was dust everywhere in the unfinished building, and there were also bloodstains on the walls. Xu Zheng took a magnifying glass and a high-light flashlight, and reflected the bloodstains on the walls inch by inch.

Seeing that Xu was standing in front of the wall without moving for 10 minutes, Team Xu introduced him, "Xiao Xu, the bloodstain in front of you belongs to Chu Yi, and he has undergone a DNA test.

From the fact that the blood splashed onto the wall and then flowed down, it can be seen that it should have splashed onto the wall after Chu Yi was hit on the head for the second time. "

Xu Zheng nodded. He continued to observe the bloodstain carefully. It had been 24 hours since the crime happened. The blood had long been fused with the dust on the wall. After it dried up, it turned black and purple. The washbasin is so big.

The blood was indeed sprayed, which was consistent with the appearance of blood sprayed on the wall after Chu Yi was beaten on the head.

"Squadron Xu, is there only Chu Yi's blood on the wall? And the blood of Tong Yanjiang and Guo Jingqing is left on the ground?" Xu Zheng looked at the bloodstains on the ground again. To be honest, so far, he has not found any evidence .

The sky outside was darker and the air was more humid, but it finally started to cool down a bit. Squadron Xu patiently said while wiping his sweat: "Indeed, we also discussed it. The test results of the victim's blood cannot prove Miao Yu is the murderer, and it cannot be proved that it is Zhou Mu."

Xu Zheng walked to the bloodstained part of the wall again, and touched it lightly with his gloved fingers, "Squadron Xu, can I destroy this bloodstain? Don't worry, I only need a palm-sized area."

Old Xu looked distressed. The scene of the crime must not be destroyed, at least he has no such right, "Xiao Xu, why don't you call Team Wan, and he agrees that we can continue working."

Xu Zheng nodded, dialed Wan Haihong directly, and told his thoughts to Wan Haihong on the other side of the phone.

"You mean to say that you invented a bloodstain stripping water that can wipe off the upper layer of bloodstain and reveal the lower layer of bloodstain?" Wan Haihong couldn't believe it. After the blood dried up, it mixed with the soil Together, they cannot be physically separated at all.

Xu Zheng insisted: "Team Wan, I can do an experiment for you. How about letting me try it if it succeeds?"

"Then you wait, I'll be there in 15 minutes."

After a while, Wan Haihong rushed over with Yan Zizhong and Zhang Yuqi, wanting to see if the blood stripping water invented by Xu Zheng was really effective.

But there was no dry blood here except the crime scene, so there was no way, it might be Wan Haihong's trust in Xu Zheng, and finally let him operate directly.

Old Xu opened his mouth to object, what is blood stripping water, what is the difference between this thing and water, can it really separate the outer layer of blood from the inner layer, and why does Xu Zheng think that there is another layer under this bloodstain? blood?
Of course, Xu Zheng didn't know what Team Xu was thinking at this moment. He was not aimless, because he observed the bloodstain for more than ten minutes, and found that some places were a little thick, because it was the blood spattered from Chu Yi's head. It can be thicker because there are only a few drops of other blood in this area.

It might belong to Chu Yi, or it might belong to Tong Yanjiang and Guo Jingqing.

"Xu Zheng, are you sure about it, kid? Don't play around here." Yan Zizhong was worried, and asked him again, but thinking of Xu Zheng's invention of the skull angiography contrast agent, and now inventing a blood stripping water, it seems Not a huge deal either.

"Leader, please rest assured that this product of mine will definitely surprise you." Xu Zheng stopped talking nonsense, and took out a small watering can from his bag. The liquid inside was transparent, and he sprayed lightly on the place he suspected. .

Then he took out Miss Xiaorui's hair dryer from the bag, and started blowing hot air on this position.

Then I sprayed the blood stripping water several times, and then blow it with a hair dryer. Good guy, the whole process lasted for 5 minutes. Several people squeezed into the small crime scene, all sweating profusely.

Finally, where he smeared, the black-purple dry blood burst open, and then under the blower of the hair dryer, a string of black-red blood was revealed. This time was short, and it was covered by an outer layer of blood, which had not yet produced Oxidized look.

Wan Haihong patted Xu Zheng's shoulder vigorously, causing him to stagger, "My boy, this water is really useful."

Xu Zheng laughed, of course, if you just use water and alcohol to peel off the top layer of dry blood, it will 100% damage the few drops of blood below.

Wan Haihong praised Xu Zheng a few words, immediately pushed Yan Zizhong and the others away, picked up a high-gloss flashlight, and observed the bloodstain in person.

The more he observed, the more satisfied he felt. After a long time, Wan Haihong laughed and stood up, "Sure enough, it's the Skynet.

It turned out that this black and red bloodstain was obviously not splashed, but the blood sticking to the stick and the murderer swung the steel rod and threw it on the wall. Standing position, coupled with the height of Miao Yu and Zhou Mu, is enough to determine who hit the stick.

Everyone present is now a master of technical investigation, and Xu Squadron also reacted at this time, looking at Xu Zheng with fiery eyes, this blood stripping water is very useful, in the future. Seeing that Wan Detachment is going to measure, he will immediately Take the measuring tape out of your pocket.

Zhou Mu is only 1.7 meters tall, and Miao Yu is 1.8 meters tall. According to their heights, standing at the murderer's position, and taking into account the length of the 80 cm steel bar, it can be inferred that the two sticks after Chu Yi fell to the ground were Who hit it.

That's right, after measuring several times, only the 1.8-meter-two Miao Yu can produce this bloodstain when he wields a steel rod.

On the other hand, Zhou Mu could only achieve this effect if he increased his height by ten centimeters out of thin air.

Zhang Yuqi gasped in amazement, "Xu Zheng, tell me the truth, how do you know there's something else going on under this piece of blood?"

Sure enough, they are all experts in criminal investigation, and they will definitely ask when they react, but Xu Zhengzao has an excuse, "You have checked the scene of the crime N times, if I use conventional methods, it still won't work. I simulated the actions of the murderer at the scene of the crime. If there is any evidence that we have not found, then there is only evidence under the blood.

Moreover, look at that steel rod, the end thick as a thumb, covered with thick blood, the blood stained on the rod will inevitably be thrown to the wall when the murderer swings it.

But the thrown blood was not found at the scene of the crime, so it can only be hidden under here."

For Xu Zheng's judgment, Wan Haihong and the others were convinced, especially Xu Squadron, who is now in the field of surveying and trace inspection. At this time, he was defeated by Xu Zheng, a layman. The method can only be used by you, Xiao Xu, and we are not sure that we can peel off the upper blood without losing the lower blood."

Wan Haihong nodded and agreed with Xu Squadron's statement, "Old Xu, hurry up and ask your colleagues to come over and re-examine the bloodstain, trying to find more clues."

He didn't mention the blood stripping water in Xu Zheng's hand, because it is Xu Zheng's own thing, and the detachment can use it, but the ownership must belong to Xu Zheng. If the technical investigation department wants to use this stripping water, they have to contact it Xu Zhengtan.

No matter what, with this blood stripping water, Xu Zheng can still apply for another practical patent.

Now that new clues have been discovered, Wan Haihong and the others didn't stay here any longer, and hurried back to the detachment to study how to proceed with the interrogation. As for the clues that Xu Zheng discovered, the technical investigation team will come to a conclusion later.

This kind of inspection report can be used as testimony in police interrogation, and can also be used as evidence in the trial of the case by the procuratorate and the court. Therefore, this time, Xu Zheng's contribution directly broke the deadlock in the case. Otherwise, Miao Yu has always refused to admit it. , this really depends on the legal principle of innocence, it is very likely that Miao Yu and Zhou Mu will not be tried for murder.

Of course, in the whole case, the information of the two murderers is still under investigation. Conducting all-round investigations from their company colleagues, wives, friends, etc., on the one hand, we can see the psychological growth process of the murderer, and on the other hand, it is also for the purpose of interrogation.

In the conference room, Wan Haihong personally told Xu Zheng's new discoveries in the conference room, and praised Xu Zheng's audience. Hearing everyone's applause for him, Xu Zheng felt as comfortable as the air in this air-conditioned room. .

　It's sunny, there is only one chapter today, and I just feel dizzy
　　
　
(End of this chapter)